斜拉桥曲面钢塔内部合理构造设计与受力分析  

Reasonable Internal Structure Design and Stress Analysis of Curved Steel Tower in Cable-Stayed Bridge

作　　者：孙旭霞 唐宇峰 武星[2] SUN Xuxia;TANG Yufeng;WU Xing(Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China;CCCC First Highway Consultants Co.,Ltd.,Xi'an 710075,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092 [2]中交第一公路勘察设计研究院有限公司,西安710075

出　　处：《结构工程师》2024年第4期168-174,共7页Structural Engineers

摘　　要：为了给斜拉桥曲面钢桥塔内部构造设计提供思路和方法,以石家庄滹沱河大桥为依托工程,在综合考虑施工可行性的前提下,提出了三种桥塔截面内部构造布置形式,并通过有限元分析,结合桥塔受力特性,得出桥塔的经济性对比结果。进一步应用有限元数值分析、理论推导和规范相结合的方式得到整体稳定折减系数计算流程,并针对三种截面进行整体稳定性分析对比。为保证曲面钢板的加劲的合理布置和板厚的选择,引入曲面局部稳定折减系数计算方法,总结计算流程,并对依托工程的曲塔壁厚和加劲布置进行多参数对比计算,得出推荐的壁厚与加劲间距的对应关系。桥塔的锚固形式多样,需要根据索力大小、内部操作空间及传力路径等多方面进行比选,最终选择与桥塔相适应的锚固构造。In order to provide ideas and methods for the internal structure design of curved steel pylons of cable-stayed bridges,based on the Hutuo River Bridge in Shijiazhuang,and under the premise of comprehensive consideration of construction feasibility,three types of internal structure layout of bridge pylon sections are proposed,and the economic comparison results of bridge pylons are obtained through finite element analysis and the mechanical characteristics of bridge pylons.The calculation process of overall stability reduction coefficient is obtained by combining finite element numerical analysis,theoretical derivation and specification,and the overall stability of three sections is analyzed and compared.At present,there is no calculation method related to local stability reduction of curved steel plate in the specification.To ensure the reasonable layout of curved steel plate stiffeners and the selection of plate thickness,the calculation method of local stability reduction coefficient of curved steel plate is introduced,the calculation process is summarized,and the wall thickness and stifener layout of curved tower supporting theproject are calculated by multi parameter comparison,and the corresponding relationship between recommended wall thickness and stiffener spacing is obtained.The anchorage forms of the bridge tower are various,so it is necessary to compare and select according to the cable force,internal operation space,force transmission path and other aspects,and finally select the anchorage structure that is suitable for the bridge tower.

关 键 词：斜拉桥钢桥塔 稳定折减系数 曲面钢塔内部构造 拉索塔上锚固 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]